Bumping post block and anchor holder and hole cap used for the same and bumping post

ABSTRACT

An anchor bolt bolt does not easily jump up even if a tire hits a bumping post. A through hole for inserting the anchor bolt into the bumping post is formed by embedding a cylindrical anchor holder. The anchor holder has a cylinder for receiving the anchor bolt and a head for containing the head of the anchor bolt. A plurality of projecting parts, forming a protruding line, prevent the head of the anchor bolt from jumping up. The projecting parts are positioned at the head of the holder. Since the head of the bolt is pressed down from above by the protruding line, the head of the bolt will not jump up over the projecting parts.

This is a Divisional application of U.S. patent application Ser. No.10/548,079, filed Sep. 6, 2005.

BACKGROUND OF THE INVENTION

1. Technical Field

The present invention relates to a bumping post block, which isestablished on an installation surface such as a car park and used forstopping a car at a predetermined position, an anchor holder and holecap used for this and a bumping post using the above.

2. Description of the Related Art

With the bumping post block established on an installation surface suchas a car park for the purpose of stopping a car at a predeterminedposition, various means have been considered for fixing the block on tothe installation surface so as not to slip or fall even when it is hitby a tire. The block is required to be crashproof, such that the fixingmeans of the block does not become loose even when it is hit by a tirewith great force, and the improvement of workability is also needed. Inthe prior art, such a method is used, in which a hole is made on theinstallation surface in advance, an anchor pin, which is pre-embedded inthe block, is inserted therein, and the hole is filled with mortar orthe like. With this method, however, there remain many problemsregarding the positioning of the anchor pin, crashproof and workability,therefore, a new method is created, which employs a fixing means suchthat a through-hole is provided in the block and an anchor pin is driventherein into the installation surface. For example, in the JapanesePatent Laid Open No. 1999-159182, an enhanced crashproof structure isrealized by adopting a configuration (such as a tapered configuration),in which the head of the anchor bolt and a predetermined portion of thehead of the anchor holder is fitted together.

According to the Japanese Patent Laid Open No. 1999-159182, the block issurely hard to be moved when compared with the existing bumping postblock and a fixing-performance is enhanced, however, there still leavesroom for improvement in the fitting condition between the anchor boltand the anchor holder, therefore, when a tire hits the block with greatforce, there is a problem that the bolt jumps over to break a mufflerand a bumper and the like.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an anchor holderhaving a structure that an anchor bolt does not easily jump over when atire hits the block, a bumping post block embedded the above, a hole capbeing used thereby and a bumping post employing the above.

The present invention is an approximately cylindrical anchor holderembedded in a bumping post block for forming a through-hole inup-and-down direction to insert an anchor bolt fixing said bumping postblock, comprising a cylinder of the holder for being inserted by saidanchor bolt and a holder head, which is located thereover, containingthe head of said anchor bolt, wherein there are provided a plurality ofprojection parts having a protruding line in the head of said holder,which prevents said anchor bolt from jumping up by contacting with theupper surface of the head of said anchor bolt when said anchor bolt isabout to jump up.

The head of the anchor bolt is the part which is provided on the upperpart of a shank, and circularly evaginating from the shank. Since thehead of the anchor bolt is locked by the protruding line, it does notjump over the projection parts in the anchor holder. That is, in thecase of inserting the anchor bolt into the anchor holder by such asdriving-in from above, when the head of the anchor bolt passes throughthe protruding line portion, the portion is once spread outward for thehead of the bolt to pass through, and after passing, protruding line ofthe projection parts is placed on the head of the bolt or pushed downfrom above. Because of this, flexibility of a certain degree as well asstrength are required for the anchor holder, therefore, it is preferablethat elastic and somewhat soft resin, such as polypropylene orpolyethylene, is used. As long as the protruding line can prevent thehead of the anchor bolt from jumping up, it is possible to adopt anyshape and any numbers of the protruding line.

The anchor holder also includes a peripheral groove provided between theprojection parts and the peripheral wall of the head of the holder tofit the foot part of a hole cap.

By providing the peripheral groove and fitting the foot part of the holecap therein the head of the anchor bolt become harder to jump over theprojection parts. That is, since the projection parts have to once makethe head of the anchor bolt pass through, flexibility in such a degreeas to be able to spread outward is required. However, the anchor holderaccording to claim 1 alone does not perform the function of theprotruding line against a strong impact, resulting in a possibility thatthe head of the bolt might jump over the projection parts. Then, theperipheral groove provided between the projection parts and theperipheral wall set up around the outermost part of the head of theholder plays a role of not only providing a physical space, in which theprojection spreads outward, but also locking the projection parts not tomove outward by fitting the foot part of the hole cap into theperipheral groove after the head of the bolt passed. Thus, the head ofthe bolt can be prevented from jumping up.

The anchor holder has ribs provided on the inner cylindrical wall of theholder.

It is preferable that the ribs are provided axially. When inserting theanchor bolt into the anchor holder, the bolt is driven while crushingthe ribs, therefore, the adhesion between the anchor holder and theanchor bolt is enhanced. Thus, the anchor bolt becomes harder to jump upall the more. In addition, from the pressure test, it is found thatthere is a difference of from 20% to 30% in the strength of the blockused between the case in which there is a gap (bumpy movement) betweenthe anchor holder and the anchor bolt, and the case in which there is nogap (bumpy movement) between them and they are closely glued together.Since, by being inserted while crushing the ribs, the anchor bolt canplay a role to enhance adhesion, the outer diameter of the shank of theanchor bolt can be a little smaller than the inner diameter of theanchor holder and the bolt allows some latitude in the outer diameter ofthe shank.

The outer diameter of the cylinder of the holder right under the neckpart of the holder, which is the boundary between the head of the holderand the cylinder of the holder, is smaller than the outer diameter ofthe lower end of the head of the anchor bolt.

By making the outer diameter of the cylinder of the holder right underthe neck part of the holder smaller than the outer diameter of the lowerend of the anchor bolt, concrete is filled right under the outer edge ofthe head of the anchor bolt. Thereby, since the impact caused by drivingthe anchor bolt can be stopped not only by the resin part of the holderbut the concrete part right under the outer edge of the head of thebolt, the strength of the anchor bolt can be enhanced and the damage ofthe anchor holder can be prevented when the anchor bolt being driven in.

In the anchor holder of the present invention, the outer peripheraldiameter of the cylinder of the holder downwardly tapers off.

By tapering off like this, when driving the anchor bolt, the downwardforce exerted on the anchor holder is converted into the force, whichtightens the cylinder of the holder, and the force can be stopped by theentire cylinder of the holder. The force, which tightens the cylinder ofthe holder acts as a force, which enhances the fitting between theanchor bolt and the anchor holder. Thus, the anchor bolt becomes harderto jump up all the more.

The anchor holder of the present invention also has a cylindrical jointpart is jointed at the lower end of the cylinder of the holder.

By jointing such a joint part, while utilizing an anchor holder of thesame standard as it is, blocks having different heights can be applied.

The present invention is also a bumping post block for stopping a tireby installing on an installation surface, and includes a through-holeprovided in an up-and-down direction by employing the anchor holderhaving the features described above.

It is preferable that the bumping post block be formed of concrete.After the block is placed at a predetermined installation location, theblock is fixed with the anchor bolt being driven into the ground throughthe through-hole. Since the anchor holder of the present invention isused, the fittability and adhesion between the anchor bolt and theanchor holder is enhanced, so that even when there is a strong impact,such as when a tire hits the block, the anchor bolt will not jump up.

The present invention is a bumping post block, having a through-holeprovided in an up-and-down direction. The block is fixed by insertingthe anchor bolt therefrom into the installation surface, wherein a holecap is provided, which fits the concave portion formed at the upper partof the through-hole, and when the hole cap is fitted onto the concaveportion, the upper surface of the bumping post block body and the uppersurface of the hole cap become flat, and at the same time, a reflectorprovided at the front of the hole cap is exposed at the front of thebumping post block body.

When the hole cap protrudes from the upper surface of the block asbefore, the cap hits the muffler and the bumper and the like, causingthe muffler to be damaged and the hole cap to be detached from thebumping post and damaged and so on. According to the present invention,the upper surface of the hole cap and the upper surface of the block isflat and free from protrusions, therefore, there is no possibility thatthe muffler of a car and the like will contact with the hole cap. Inaddition, by providing a receptacle hole for the hole cap in the frontsurface of the block, when fitting a hole cap, on which a reflector isprovided at the front, the cap can be made to act as a reflector.

The present invention is also directed to a hole cap, which is mountedon the upper part of a through-hole of the bumping post block having thethrough-hole provided in an up-and-down direction. The hole cap has anupper surface in the shape of a plane, a front part provided with areflector and a cylindrical foot part.

The upper surface is in the flat-surface configuration so that the uppersurface of the block and the upper surface of the cap can become flatwhen fitted on the head of the holder as mentioned above. And the footpart formed in the lower part is made to be cylindrical so as to lockthe movement of the projection parts of the head of the holder beingfitted. In addition, the configuration of the cross section of the footpart should be matched with that of the peripheral groove of the head ofthe holder and it can be circular or quadrangular or whatever. The holecap according to the present invention can perform the above mentionedfunction by being used with the bumping post block and at the same time,can be a single part having both the application as the protection capof the anchor holder as before and the application as a reflector.

The present invention is a bumping post including a bumping post blockbody, in which the anchor holder is embedded and a through-hole isprovided in an up-and-down direction, an anchor bolt having the headpart and being inserted from the through-hole into the installationsurface so as to fix the block onto the ground and the hole cap.

Since the above mentioned bumper post block body of the presentinvention, which is embedded with the anchor holder of the presentinvention, and the hole cap are employed, the fittability and adhesionbetween the holder and the bolt is enhanced, the body can be firmlyfixed onto the ground and provide an excellent crashproof structure.

The bumping post block also includes at least one insert, for insertingan auxiliary anchor, embedded in the base.

With the bumping post block according to the present invention, prior toinstallation, an auxiliary anchor is driven into the insert in advance,mounted by such as screwing, and after that, a bonding agent such asbond and mortar is filled into an embedded hole provided on the groundat a predetermined installation location, the protruded portion of theauxiliary anchor is embedded therein. Thus, the block can temporarily betacked onto the installation location, and at the same time a strongercrashproof structure can be provided. As for the auxiliary anchor,reinforcing steel and a bolt can be employed.

The bumping post block of the present invention can have an indicationpart for performing an indication such as posting a name indicationsticker onto a part of the inclined part provided at the front surfaceof the block, wherein the indication part has a configuration of aconcave curved surface.

The indication part has a concave surface configuration in order toprevent the tire from contacting the name indication sticker and thelike posted on the indication part. The curvature is set to be of adegree such that the tire of an assumable minimum standard (the tire ofa light motor vehicle and the like) does not make contact. Thus, anytires of any standard having a larger size than the minimum standardcannot make contact with the indication part. Since tire contact is notpossible, it can prevent letters on the posted sticker from wearing andthe sticker itself from peeling. The configuration can be applied to thebumping post block described above.

According to the anchor holder, hole cap, bumping post block and bumpingpost of the present invention, adhesion between the anchor holder andanchor bolt is enhanced and the bumping post block and bumping postemploying these features an excellent crashproof structure, andtherefore, the anchor bolt does not jump up and damage the muffler andthe like, and thus it is safe and excellent in durability.

BRIEF DESCRIPTION OF THE DRAWINGS

FIGS. 1(a)-(d) show a plan view, a cross sectional view, a side view anda bottom plan view of an anchor holder.

FIG. 2 is a cross sectional view of the bumping post.

FIGS. 3(a)-(c) show a plan view, front elevation view and crosssectional view of the bumping post block.

FIG. 4 is a schematic diagram of another embodiment of a bumping post.

FIG. 5 is a schematic diagram of another embodiment of a bumping post.

FIG. 6 is a central longitudinal sectional view of a bumping post block.

FIGS. 7(a)-(d) show a plan view, front elevation view, bottom plan viewand side view of a hole cap.

DETAILED DESCRIPTION OF THE INVENTION

A preferred embodiment of the present invention will be explained basedon the drawings as follows. The anchor holder according to theembodiment of the present invention will be explained with reference toFIG. 1 and FIG. 2. The anchor holder of the present embodiment is madeby using polypropylene. FIG. 1(a) is a plan view, FIG. 1(b) is a crosssectional view, FIG. 1(c) is a side view and FIG. 1(d) is a bottom planview of the anchor holder 1 according to the embodiment of the presentinvention. As shown in the cross sectional view, the anchor holder 1includes a head 2 and a cylinder 3. These can be formed as an integralunit, however, they can be combined after being made separately. In thepresent embodiment, the head 2 of the holder and the cylinder 3 of theholder are combined after being made separately. The head 2 of theholder comprises: projection parts 4 having an introverted protrudingline 5 at an upper part, a peripheral groove 6 outside the projectionparts 4, a peripheral wall 7, which is set up outside of the peripheralgroove 6, and a flange part 8 around the lower edge of the peripheralwall. In the present embodiment, four projection parts 4 are erected,and arranged in such a way that, as shown in the plan view of FIG. 1(a),two pairs face each other. The space surrounded by the four projectionparts 4 and located under the protruding line 5 is a receptacle hole 12for the head of the bolt, and it is intended to include the head of thebolt when the anchor bolt is inserted. In addition, the peripheralgroove 6 is a space to permit the projection parts 4 to be able tospread outwardly when the anchor bolt is inserted and the head of thebolt passes through. After insertion, by fitting a foot part of a holecap thereon, movement of the projection parts 4 in a direction outsidecan be locked or prevented. Explanation of the inserting of the anchorbolt will be described later. In addition, the flange part 8, which hislocated at the lower edge of the head 2 of the holder is provided, sothat, when the anchor holder is embedded in the block, the holder willnot easily drop out of the concrete.

The cylinder (cylindrical portion) 3 of the holder comprises a cylinderbody 14 and a neck 15 which is formed in a flange-fashion at the upperpart and fitted into the head 2 of the holder. The inside of thecylinder body 14 serves as a receptacle hole 13 for receiving the shankwhen the anchor bolt is inserted. While an inner peripheral rib 11 isprovided inside, a tapered rib 10 is provided outside, and is connectedfrom a peripheral rib 9 on the lower surface of the neck 15 of theholder. The outer peripheral surface of the cylinder body 14 is taperedto provide a smaller diameter in the lower direction, thus, when theanchor bolt 40 is inserted, the downward force exerted on the cylinder 3of the holder is transformed to a force to squeeze the cylinder inside,causing the cylinder 3 of the holder to tightly engage the anchor bolt40. The inner peripheral rib 11 can be clearly seen in the plan view ofFIG. 1(a) and the bottom plan view FIG. 1(b). Since the internaldiameter of the inner peripheral rib 11 is a little smaller than thediameter of the bolt shank 42 of the anchor bolt 40, when inserting theanchor bolt into the receptacle hole, the adhesion between the anchorbolt and the anchor holder is enhanced with the convex ribs beingcrushed. The outer peripheral ribs 9 function to reinforce the neck 15of the holder supporting the head 2. The tapered ribs 10, connected tothe above are tapered in a lower direction, and function to enhance thestrength of the anchor holder as well. In addition, as shown in FIGS. 1and 2, the outer diameter of the cylinder 3 of the holder, which islocated just under the neck 15 of the holder forming the border betweenthe head 2 of the holder and the cylinder 3 of the holder, is smallerthan the outer diameter of the lower edge of the head 41 of the anchorbolt 40. As shown in FIG. 2, just under the outer edge of the head 41 ofthe bolt (the outside of the cylinder of the holder), the concretebreaks in. Thus, since the impact, caused by the driving-in of theanchor bolt, can be stopped not only by the resin part of the holder,but also by the concrete part just under the outer edge of the head 41of the bolt, the strength of the anchor holder can be enhanced, anddamage to the anchor holder can be prevented when the anchor bolt isbeing driven-in.

FIG. 2 is a bumping post according to the first embodiment of thepresent invention. The bumping post according to the present embodimentcomprises: the anchor holder 1 according to the embodiment of thepresent invention shown in FIG. 1, the bumping post block 21 accordingto the embodiment of the present invention, in which the holder isembedded, the anchor bolt 40 inserted into the holder and a hole cap 30,which is fitted on the holder.

Initially, the bumping post block 21 according to the embodiment of thepresent invention will be explained. FIG. 3(a) is a plan view, FIG. 3(b)is a side view and FIG. 3(c) is a front elevation view of the bumpingpost block 21. As shown in the features, the bumping post block isalmost a rectangular solid whose longitudinal sectional configuration isalmost trapezoidal. Two receptacle holes 27 for the hole cap areprovided on the upper surface 22 of the block and anchor holders 1 areembedded therein, respectively. Thus, the through-hole 25 is formed.There is an indication part 28 in a center of an inclined part 23, andprovides a location for a name indication sticker to be posted thereon.In addition, it is possible to apply a bonding agent on the base 24.

The method of forming the bumping post block 21 is as follows. Firstly,a mold form (not shown) is set in such a way that the base becomes theupper side, which is a completed status. A protrusion is provided inadvance in the mold form for forming the receptacle holes 27 for thehole caps, and since the head 2 of the anchor holder 1 can be jointedthereon, the anchor holder 1 is mounted at this part of the mold formbeing set. In the present embodiment, as shown in both FIGS. 3(a) and(b), two anchor holders 1 are attached to one block. In addition, theanchor holder is used for positioning of the anchor bolt to be insertedstraight and by being closely stuck to the anchor bolt for enhancing thecrashproof nature of the block itself. By embedding the anchor holder 1,as shown in both FIGS. 3(b) and (c), the through-hole 25 can be formedin the block 21. In the present embodiment, a boss for forming aspreading or diverging hole part 26 in the anchor holder 1 is attachedat the tip of the cylinder 3 of the holder. After that, concrete ispoured in the mold form, and after curing, the mold form is detached.Thus, the bumping post block 21 of the present embodiment can beproduced, in which the anchor holder 1 is embedded.

FIG. 2 shows a state in which the bumping post block 21 of theembodiment of the present invention has the anchor bolt 40 inserted. Theanchor bolt 40 is made entirely of metal and the head 41 of the bolt isintegrally molded by a method such as forging. The anchor bolt can bedriven into the installation surface by, for example, the blow of ahammer or by driving the bolt in using a driving machine such as ahammer drill. It is necessary that the anchor bolt 40 should be drivenin to such a degree that it penetrates sufficiently through the bumpingpost block 21 to reach the ground below so as to be fixed. The bolt'slength should be longer than the height of the block. The drive-in scrapproduced while driving can be accommodated in the spreading or expandedhole part 26 of the block 21. Thereby, the block 21 can be preventedfrom being lifted from the ground by the drive-in scrap. Additionally,in consideration of an easy driving-in operation, the anchor boltaccording to the present embodiment has a sharp-pointed configuration.

When the anchor bolt is initially driven in, the shank 42 of the bolt isinserted and crushes the inner peripheral ribs 11 of the cylinder of theholder. Thereby, adhesion between the holder and the bolt is enhanced.Then, at the stage when the head 41 of the bolt passes through theprojection parts 4, since the head 41 of the bolt goes through the partof the protruding line 5, the projection parts 4 spread outwardly. Andafter the head 41 of the bolt passes through the projection parts 4,they restore to their original positions due to elasticity. Thus, thehead 41 of the bolt is set in the space of the receptacle hole 12 forthe head of the bolt in the head 2 of the holder. Thereby, the head 41of the bolt is held down from above by the protruding line 5, andtherefore, the head 41 of the bolt does not jump up over the projectionparts 4. As shown in FIG. 2, by fitting the foot part 32 of the hole cap30 into the peripheral groove 6 of the head 2 of the holder, thetendency of the projection parts 4 to spread outward is suppressed,which prevents the head 41 of the bolt from jumping up all the more.

As shown in FIGS. 2 and 7, the hole cap 30 according to the presentinvention comprises an upper surface 31, the foot part 32 and areflector 33. As mentioned above, the hole cap 30 is applied by fittingthe peripheral groove 6 of the head 2 of the holder with the foot part32. The upper surface 31 of the cap has a flat-surface configuration,and being fitted onto the head 2 of the holder, the upper surface 31 ofthe cap and the upper surface 22 of the block form a flat surface. Thecap does not protrude from the upper surface of the block, so that whena tire hits the block, the car body such as the muffler will not bedamaged and the cap is not damaged. In addition, a well-known reflectingmirror is used for the reflector fixed on the front surface, whichenables drivers to notice the presence of the block by the reflection ofthe headlights of the car in the dark. Thus, the hole cap 30 of thepresent invention performs multiple functions by itself. FIGS. 7(a)-(d)show various view of the hole cap.

Further, the bumping post 20 according to the present embodiment can befixed on an installation surface by well-known methods such as a method,in which a well-known anchor member having a slip stopping function atthe tip of the anchor bolt is attached and fixed.

In order to establish the bumping post 20 according to the presentembodiment, at first, a bonding agent is applied to the base of thebumping post block 21, which is then placed at a predeterminedinstallation location and temporarily fixed. Next, into the through-hole25 of the anchor holder 1, the anchor bolt 40 is inserted from above,and is driven into the installation surface using a driving device suchas a hammer drill. When the driving-in operation is furnished, the head41 of the bolt is housed in the receptacle hole 12 and the condition inFIG. 2 is realized. After that, when the hole cap 30 is fitted, theoperation is concluded. By performing the above operations for each ofthe two anchor holders, the bumping post 20 is fixed onto theinstallation surface.

As shown in FIG. 4, the bumper post 50 and the bumping post block 51, inwhich a cylindrical joint part 52 is connected to the anchor holder 1and embedded to form a through-hole in an up-and-down direction, isfixed by the anchor bolt 40 onto the installation surface and the holecap 30 is installed. The height of the bumping post block is usually 120mm, and since the anchor holder 1 according to the embodiment of thepresent invention is produced to meet this, for blocks having a largerheight, by employing joint parts, which meet the height of the block, itis possible to accept blocks having different heights. The basic anchorholder 1 can have an identical configuration, therefore, it can beapplied in many situations. Moreover, the joint part 52 is externallyfitted and jointed at the tip of the anchor holder 1, however, as longas it can extend the height, any configuration of jointing is allowable.With the exception of the jointing of the joint parts, the bumper post50 is the same as the above mentioned bumping post 20.

As for the method of fixing the bumping post except for the above, amethod can be adopted, in which the anchor bolt is not driven in fromabove. In this fixing method, the bumping post block and hole capaccording to the above embodiment are available. As shown in FIG. 5,before placing the bumping post block 21 at the installation location,the anchor bolt 61 is inserted into the anchor holder 1. The anchor bolt61 is a regular metal bolt having a hexagonal head 63, and in this case,the plastic head 66 of the bolt is provided so as to be slidably fitted.Since this construction method is not intended for driving the anchorbolt into the installation surface, the plastic head can be sufficientin view of the strength. After the head 66 of the bolt is set right intothe receptacle hole 12 the anchor bolt 61 is tightened with a nut 62from the spreading hole part 26 of the bumping post block 21. Bytightening from below by the nut, the anchor bolt 61 is fixed in theanchor holder 1. After tightening with the nut, at a predeterminedinstallation location of the bumping post, an embedded hole 64 isprovided for embedding the end of the bolt, which is protruded from thebase 24 of the block 21. A bonding agent such as mortar 65 can be usedto embed the end of the bolt in the hole 64. This fixing method alsoallows the bumping post block to be firmly fixed onto the ground andenables the effects of the invention to be obtained due to the structureof the anchor bolt according to the present invention, and therefore,the block is effectively crashproof. Since the anchor bolt is fixed onthe bumping post block, there is no possibility that the bolt will jumpout of the block due to impact.

FIG. 6 shows a central longitudinal sectional view of the bumping postblock 21. The indication part 28, formed at the center of the inclinedpart 23, has a configuration of a concave curved surface. By setting theradius R of curvature of the concave curved surface of the indicationpart 28 in the longitudinal section to be such a degree that the tire ofan assumable minimum standard of cars does not make contact (radius ofcurvature smaller than the minimum radius of a tire), tires of most carscannot make contact with the indication part. Usually a name sticker andthe like are posted on this part. Thereby, letters on a posted stickerwill be resistant to wear and the sticker itself becomes harder to peel.

As shown in FIG. 6, in the bumping post block 21, a plastic-made insert70 for mounting an auxiliary anchor 71 is embedded at the center of thebase. The auxiliary anchor is mounted if necessary, and it permitsinstallation of the bumping post block without permanently mounting it.When mounting the auxiliary anchor, prior to the installation of theblock 21, the auxiliary anchor 71 is driven into the insert 70 inadvance, such as by screwing-in. Then the protruded portion of theauxiliary anchor 71 is embed into the embedded hole, which is providedin a predetermined installation surface and the holes is then filledwith a bonding agent 73 such as bond and mortar. Thus, the block can betemporarily fixed to the installation location, and at the same time astronger crashproof structure can be provided. As for the auxiliaryanchor, members such as reinforcing steel and the bolt can be employed.

1. A concrete curb block comprising: a concrete curb block body having athrough hole oriented in a vertical direction for receiving an anchorbolt to fix said concrete curb block body to an installation surface; aconcave portion formed in an upper surface of said concrete curb blockbody; a hole cap fitted into said concave portion such that said uppersurface of said concrete curb block body and an upper surface of saidhole cap form a flat surface; and a reflector disposed at a frontportion of said hole cap such that said reflector is exposed to a frontside of said concrete curb block body.
 2. The concrete curb block asclaimed in claim 1, further comprising an anchor holder inserted in saidthrough hole, wherein said hole cap is mounted on an upper part of thethrough hole, said upper surface of said hole cap has a shape of aplane, and said hole cap includes a cylindrical foot part, and whereinsaid anchor holder comprises a generally cylindrical portion forreceiving a shank of the anchor bolt, and a head portion positioned atan upper end of the cylindrical portion for containing a head of theanchor bolt, said head portion having a plurality of projecting partsfor overlying an upper surface of the head of the anchor bolt wheninserted therein.
 3. The concrete curb block as claimed in claim 1,further comprising: at least one insert for receiving an auxiliaryanchor, said at least one insert being embedded in a base portion ofsaid concrete curb block body.
 4. A hole cap capable of being mounted onan upper part of a vertical through-hole provided in a concrete curbblock, said hole cap comprising: a flat upper surface having a shape ofa plane; a front part provided with a reflector; and a cylindrical footpart.